May/June 2026 Paper 21

2026 · 40 questions · 40 parts · 40 marks

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1Enthalpy Changes Energy Profiles CalorimetryMedium1 mark
When water evaporates from a brass surface, the temperature of the brass surface decreases. Which row describes this evaporation process?
type of processdirection of transfer of thermal energy
Aendothermicfrom the brass surface to the water
Bendothermicfrom the water to the brass surface
Cexothermicfrom the brass surface to the water
Dexothermicfrom the water to the brass surface